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# vocab list #6

### vocabulary words number 6

Term | Definition |
---|---|

points | a point refers usually to an element of some set called a space. |

lines | A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions. |

line segments | a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its end points. |

right angle | A right angle is equal to 90 degrees |

acute angle | An angle that measures less than ninety degrees but more than zero degrees. |

obtuse angle | An angle that measures more than 90 degrees but less than 180 degrees. |

perpendicular lines | Perpendicular means "at right angles". A line meeting another at a right angle, or 90° is said to be perpendicular to it. |

parallel lines | Parallel lines are two lines that are always the same distance apart and never touch. In order for two lines to be parallel, they must be drawn in the same plane, a perfectly flat surface like a wall or sheet of paper. |

right triangle | is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle |

line of symmetry | Another name for reflection symmetry. One half is the reflection of the other half. The "Line of Symmetry" (shown here in white) is the imaginary line where you could fold the image and have both halves match exactly. |

Created by:
brayden.turner